Filter



Sept. 2 s 1 J. N. s. WILLIAMS FILTER Filed Aug. 11, 1925 I, Patented Sept.

for liquids, especially screen or finely -,perforated metal UN TED-ISi T T031113, s. mun

'or nouonunu, rminrrony or mwm.

,FPAT ICE."

EN-TioF rnxmn.

Application fled August 'The invention relates to pressure filters dense syrups, and has for its objectto provide a slmple and eflicient construction that is readily assembled and operated under high pressure without danger of rupturing or im airing the filtering medium, which ispre erably composed of paper, parchment; silk, cotton or linen fabric,-finely woven, metal cloth, or other suitable material, which .is secured trli a ate adapted to be trolled; into cylindrical orm and reinforced byz-fa hollow column composed of. stacked 'rin s of thin metal or simil'alf material provi ed with a multiplicity ofpassageways, the;.whol e=being enclosed ina suitable casing.

;"Fig. 2 isa o The invention is illustrated in the accompanying drawings,- in which F 1 is'a sectional elevation of the filter. plan view of the filtering medium and its 'supportingscreen.

ring-shaped member 11, WhlCh iS secured in proper spaced relation with respect to section' 1. by rods or bolts 6 having reduced ends engaging corresgonding openings in plici sections 1 and 11, sai reduced ends being provided with screw threads, which receive,

clamping nuts 7 The uplper threaded ends of two ofthe diametrica y opposite rods '6 are extended outwardly to su portfa yoke 8, which is'locked in position by nuts 9, 9, said yoke carrying a, set screw 10 engaging a threaded opening in the middle of the yoke. I

Disposed centrally and longitudinally of the frame, constitutedbyth'e end sections 1 and 11 and the. connecting rod V6, is a hollow column consisting of a series of: stacked rings 12, preferably made ref-thin metal or the like, whichare/provided with a multi- 't of radial channels 13, as illustrated 1g. 4. The hollow column is held against lateral movement by the four rods 1 acking washer '4; The other end section 0 the filter is a 11, 1925. Serial 10,49,624.

6 and is clampedagainst longitudinal move meli ilti between the end sections 1 and 11.

e drical column is to afford a rigid support for the filtering medium and thereby 'pre-' primary purpose of the hollow cylin vent the, latter being damaged or impaired by the heavy "pressure which maybe used in orcing the liquid to be filtered through the medium, the multiplicity of channels or passageways 13 permitting the ready escape of the filte ged liquid. The filteringmedium properis preferably in the form of a sheet I of fabric, such as paper, parchment, silk,- cotton, linen or finely woven metal cloth well adapted to remove the finest solidmatter from the liquid to be filtered, said filter- .ing medium, indicated at 15, beingfsecured to a sheet'of metal14 provided with a multiplicity offine-perforations, the filtering element 15 being secured to the screen 14 by turning the edges ofthe fabric 15 over' the edges of the screen and securing the fold ;by U-sha (1 metal clips, as shown in Fig. 3. The ltering medium and its sup orting screen, which are primarily in the fdrm of flat sheets, are then-rolled into substantially cylindrical form, as indicated in Figs. 2 and 3, with the lateral edges overlapping,,thus forming a flexible screen capable: of expansionunder internal pressure, and inserted within the hollow column constituted by the stack of rings 12, so that, .as the screen 14 expands radially under pressure," it will fit snugly against the' interior surface of the hollow column and the more or less fragile filtering-fabric 15 will be, supportedat all points, first, ,by the flexible screen .14, to which it is attached, and second, byjthe rigid walls of the hollowcolumn.

. supportingscreen 14 the central opening in "the; endsection 11 0f diameter than the opening in the column of .In order'to facilitate thein'sertion and"- removal of the filtering medium 15 and its the frame is of larger sta'cked rings, said opening being adapted I to receive the ca which fits within t e opening and is adapted to compress a packingwasher' 21, resting upon the upper end of the hollow, column,

or closure element 20,

said closure being held in clampingrelation against the packing ring 21 by means of the set screw 10 carried by the yoke 8. Theclosure 20 is preferably provided with a vent opening 22 provided with a suitable petcock, or relief-valve 23.

'A-su'itable shellor casing 25 is adapted to over the upper end section 11 and eng 7 end sectlon 1, the shell or casing being reade anannular flange on the lower ily removable to afford access" to the i11-v terior of the filterior cleaning, adjustment,

or repair thereon and inserted within the opening of the suppacking porting column formed by the rings 12. The ring 21 and closure 20 are then placed in position and slightly forced downward by set screw 10 to' expand packing washer 21,.to form a liquid tight seal with the periphery of the central opening in the top section 11 and'withthe ends of the column of-stacked rings 12 and screen 14, a

liquidtight seal between the lower ends of the column and the screen being efl'ected by the washer i-inizthe bottom section 1. order to set the flexible screen 14, carrying the filtering medium 15, firmly against the interior surface the supporting column, a et oflcompres'sed air, or other suitable fluid pressure medium, is admitted through mg mg disposed between said closure and j the adjacent ends of the colu'mnand screen.

to cause the same to hug tightly the interior inlet 2, which will expand the flexible screen walls of the column. After this has been efiected, the screw is set up sufiiciently to make a hquid tight joint top and bottom to stand the ultimate pressure under which the filter is operate, the air vent 22 is opened and the liquid to be filtered is]. admitted until all ofthe air or other fluid pressure medium has been'dis'placed through the pet-cock 23, after which the latter is closed and the fil-' tration "proceeds, the clear liquid passing through thefiltering medium 15, the perfo-. rations in screen 14 and'the channels or ducts- 1n the rings of the supporting column and I being ultimately discharged at the outlet 3. If the valuables to be recovered are in the 'efliuent, the latter is immediately available for any further operations that may be rei Y dium 15 they-may be completelyrecovered by openmg the apparatus, removmg the flexquired. On the other hand, if the valuables are in the residue left on the filtering metween one end section and ible screen with the filteringmediuni attached thereto and stripping the material from the surface of the filtering medium.

What I claim 1n lateral outlet, a hollow column of stacked thin rings centrally disposedin said casing and having multiple passageways therethrough, aflexible filtering screen lcapable of expansion under pressure e'ngagingi the interior of the hollow column, a filtering fabric secured to the innerface of said 1. A pressure'filter comprisilig an encloscasing having a central inlet and a screen, and acking r' gs' disposed between 1 the top .an bottom of the casing and the ends of the column and: screen.

2. In a pressure filter, a casinggcomprismg I end sections and anenclosingzshell, a cen-l tral inlet and a lateral outlet inlonexofsaid end sections and a central opening inx'the other, bolts for holdingthe end'sections in spaced relation, a hollow of stacked thin rings disposed centrally in said casing and 9 fi ed betweenthe :end sections, a

flexible filtering'screen capableort expansion under" pressure engaging the interior of the column, a filtering fabric secured to the in-' ner face of said screen,'a,paclnng ring becolumn and screen, a closure for the central opening in the other end section, and a pack- 3. In a pressure filter, a casing comprlsmg he ends of the end sections and an enclosing sh ll, a mm 9 tral inlet and a lateral outlet in oneofsaid,

end sections and a central opening inthe other, bolts for holding the end sections 1n spaced relation, a hollow column of stacked' thin rings disposed centrally-in said casing and confined.v between the end sections, a flexible filtering screen capable of expansion under pressure engaging the interior of the column, a filtering fabric secured to the inner face of said screen, a- 'packing ring between one end section and the ends of the,

column and screen, a closure'for the central opening inthe other end section, a yoke carried by two of said bolts, a screw mounted in said yoke engaging said closure to lock the latter in position, and a packing ring disposed'between said. closure and the-adjacent ends of the column and screen.-

aturc. 1

In testimony whereofI afiix m si JOHNN. S. 

